As the topo map
on his iPhone guided us infallibly to another likely hunting spot, Shay paused and thoughtfully said, "These maps are amazing.
I'd printed off the aerial photo on one side and the topo map
on the backside.
The Historical Topo Map
section features historical maps that provide a snapshot of the nation's physical and cultural past.
This "information topography" is as informative as an earth-based topo map
in identifying the peaks and valleys of the environment.
You thought you were cutting a straight line, but when you stepped back and looked, it was a line on a topo map
. No problem: It looks more natural this way.
To do any serious hiking, though, spring for the $12 topo map
sold at Bassetts Station (100 Gold Lake Rd.; 530/862-1297).
I need to identify and digitize forested areas on top of this aerial photograph, with a topo map
(DRG) as another base map.
With the creative assistance of the two engineering interns, we developed a topo map
in AutoCAD[R] by converting a digital photo we had taken of the quad map.
Among the topo map
, help desks, pair of 18-foot Duratrans panels, exposed timbers, and copper detailing is a steel-framed canvas camp tent, complete with a sleeping bag and a DVD player to occupy the young ones.
The fieldwork, then, is a process of 3-way checking: attempting to match the GNR data with the topo map
features, with on-ground observation.
With a few clicks, users can view and print a topo map
side by side with an aerial photo in 2-D or 3-D.